{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["GENE"], "input": "A sheep testicular cDNA library constructed in pcDNA1 vector was screened with a probe generated by polymerase chain reaction ( PCR ) and corresponding to a 1 . 6 kb fragment of the rat luteinizing hormone receptor cDNA ."}
{"GENE": ["rat luteinizing hormone receptor cDNA"]}